debian/postinst

   1 #!/bin/sh
   2 # postinst script for kernel-2.6-cn
   3 #
   4 # see: dh_installdeb(1)
   5
   6 set -e
   7
   8 # summary of how this script can be called:
   9 #        * <postinst> `configure' <most-recently-configured-version>
  10 #        * <old-postinst> `abort-upgrade' <new version>
  11 #        * <conflictor's-postinst> `abort-remove' `in-favour' <package>
  12 #          <new-version>
  13 #        * <deconfigured's-postinst> `abort-deconfigure' `in-favour'
  14 #          <failed-install-package> <version> `removing'
  15 #          <conflicting-package> <version>
  16 # for details, see http://www.debian.org/doc/debian-policy/ or
  17 # the debian-policy package
  18 #
  19
  20 case "$1" in
  21     configure|reconfigure)
  22       # continue below
  23     ;;
  24
  25     *)
  26         exit 0
  27     ;;
  28 esac
  29
  30 # import CN-functions
  31 . /usr/share/carnet-tools/functions.sh
  32
  33 # import GRUB helper functions
  34 . /usr/share/kernel-2.6-cn/grub-functions.sh
  35
  36 ################################################################################
  37
  38 # starting up backup
  39 echo -n "CN: Backed up to /var/backups:"
  40
  41 # backup lilo.conf
  42 if [ -e /etc/lilo.conf ]; then
  43     cp_backup_conffile /etc/lilo.conf
  44     echo -n " lilo.conf"
  45 fi
  46
  47 # backup old kernel params
  48 if [ -e /etc/sysctl.conf ]; then
  49     cp_backup_conffile /etc/sysctl.conf
  50     echo -n " sysctl.conf"
  51 fi
  52
  53 # backup old kernel params
  54 if [ -e /etc/kernel-img.conf ]; then
  55     cp_backup_conffile /etc/kernel-img.conf
  56     echo -n " kernel-img.conf"
  57 fi
  58
  59 # finished
  60 echo "."
  61
  62 ################################################################################
  63
  64 # remove obsolete symlinks and kernels
  65 rm -f /boot/vmlinuz /boot/vmlinuz.old /boot/vmlinuz.old2 \
  66     /boot/vmlinuz.plain /vmlinuz /vmlinuz.old /boot/vmlinuz.plain \
  67     /boot/vmlinuz.generic /boot/vmlinuz-generic /boot/vmlinuz-old
  68 echo "CN: Removed old symlinks in / and /boot."
  69
  70 ################################################################################
  71
  72 # intro msg
  73 echo -n "CN: Configuring system (this will take a while):"
  74
  75 # generate kernel-img.conf
  76 if [ ! -e /etc/kernel-img.conf ]; then
  77     touch /etc/kernel-img.conf
  78 fi
  79
  80 # update postinst_hook for grub
  81 if grep -q postinst_hook /etc/kernel-img.conf; then
  82     cp_check_and_sed '^postinst_hook' \
  83         's;^postinst_hook[[:blank:]]*=.*;postinst_hook = /usr/sbin/update-grub;g' \
  84         /etc/kernel-img.conf || true
  85 else
  86     echo "postinst_hook = /usr/sbin/update-grub" >> /etc/kernel-img.conf
  87 fi
  88
  89 # update postrm_hook for grub
  90 if grep -q postrm_hook /etc/kernel-img.conf; then
  91     cp_check_and_sed '^postrm_hook' \
  92         's;^postrm_hook[[:blank:]]*=.*;postrm_hook = /usr/sbin/update-grub;g' \
  93         /etc/kernel-img.conf || true
  94 else
  95     echo "postrm_hook = /usr/sbin/update-grub" >> /etc/kernel-img.conf
  96 fi
  97
  98 # enable initrd
  99 if grep -q do_initrd /etc/kernel-img.conf; then
 100     cp_check_and_sed '^do_initrd' \
 101         's/^do_initrd[[:blank:]]*=.*/do_initrd = yes/g' \
 102         /etc/kernel-img.conf || true
 103 else
 104     echo "do_initrd = yes" >> /etc/kernel-img.conf
 105 fi
 106
 107 echo -n " kernel-img.conf"
 108
 109 # generate initial grub loaders
 110 if [ ! -d "$grub_dir" ]; then
 111     mkdir -p "$grub_dir"
 112     # x86
 113     if [ -d /usr/lib/grub/i386-pc ]; then
 114         cp -a /usr/lib/grub/i386-pc/* "$grub_dir"
 115     # x86_64
 116     elif [ -d /usr/lib/grub/x86_64-pc ]; then
 117         cp -a /usr/lib/grub/x86_64-pc/* "$grub_dir"
 118     fi
 119 fi
 120 echo -n " grub1"
 121
 122 # create/update grub configuration
 123 if [ -e "$menu_file" ]; then
 124     # is there uncompatibile grub conf present?
 125     if ! grep -q 'AUTOMAGIC KERNELS LIST' "$menu_file"; then
 126         mv -f "$menu_file" "$menu_file.old"
 127     fi
 128 fi
 129 if [ ! -e "$menu_file" ]; then
 130     yes | /usr/sbin/update-grub >/dev/null 2>&1 || true
 131 else
 132     /usr/sbin/update-grub >/dev/null 2>&1 || true
 133 fi
 134 echo -n " grub2"
 135
 136 # workaround grsec
 137 if uname -a | grep -q grsec; then
 138     if [ -x /sbin/chpax ]; then
 139         # grub
 140         if [ -x /usr/sbin/grub.real ]; then
 141             chpax -spmrx /usr/sbin/grub.real >/dev/null 2>&1 || true
 142         elif [ -x /usr/sbin/grub ]; then
 143             chpax -spmrx /usr/sbin/grub >/dev/null 2>&1 || true
 144         fi
 145
 146         # grub-probe
 147         if [ -x /usr/sbin/grub-probe.real ]; then
 148             chpax -spmrx /usr/sbin/grub-probe.real >/dev/null 2>&1 || true
 149         elif [ -x /usr/sbin/grub-probe ]; then
 150             chpax -spmrx /usr/sbin/grub-probe >/dev/null 2>&1 || true
 151         fi
 152
 153         echo -n " grsec"
 154     fi
 155 fi
 156
 157 # remove obsolete devfs/compat links and restore normal udev behaviour
 158 rm -f /etc/udev/rules.d/devfs.rules /etc/udev/rules.d/compat.rules \
 159     /etc/udev/rules.d/compat-full.rules
 160 #if [ ! -e /etc/udev/rules.d/udev.rules ]; then
 161 #    ln -s ../udev.rules /etc/udev/rules.d/udev.rules
 162 #fi
 163 udevadm control --reload_rules >/dev/null 2>&1 || true
 164 udevsettle || true
 165 echo -n " udev"
 166
 167 # update device map if possible
 168 if [ -f "$device_map" ]; then
 169     mv -f "$device_map" "$device_map.old"
 170 fi
 171 grub --batch --no-floppy --device-map="$device_map" <<EOF >/dev/null 2>&1
 172 quit
 173 EOF
 174 if [ ! -s "$device_map" ]; then
 175     if [ -f "$device_map.old" ]; then
 176         mv -f "$device_map.old" "$device_map"
 177     fi
 178
 179 else
 180     rm -f "$device_map.old"
 181 fi
 182 echo -n " grub3"
 183
 184 # import GRUB helper functions (again, updated device map)
 185 . /usr/share/kernel-2.6-cn/grub-functions.sh
 186
 187 # get install device (0x80 BIOS device)
 188 install_device=$(grep '^(hd0)' "$device_map" | \
 189     sed -e 's%[^[:space:]]*[[:space:]]*\([^[:space:]]*\)%\1%')
 190 if [ -z "$install_device" ]; then
 191     echo "."
 192     echo "CN: FATAL ERROR while detecting boot disk!"
 193     echo "CN: Do not reboot your server and report this to OTRS immediately!"
 194     exit 1
 195 fi
 196
 197 # oops, install device is a symlink...
 198 if [ -h "$install_device" ]; then
 199     install_device_resolved=$(resolve_symlink "$install_device")
 200     if [ -z "$install_device_resolved" ]; then
 201         install_device_resolved="$install_device"
 202     fi
 203
 204     # try to fix device map with symlink resolved device
 205     if [ "x$install_device_resolved" != "x$install_device" ]; then
 206         cp_check_and_sed '^\(hd0\)' \
 207             "s;^(hd0).*;(hd0)   $install_device_resolved;" "$device_map" \
 208             || true
 209     fi
 210 fi
 211 echo -n " grub4"
 212
 213 # install GRUB loader
 214 if ! grub-install --no-floppy "$install_device" >/dev/null 2>&1; then
 215     echo "."
 216     echo "CN: FATAL ERROR while running grub-install!"
 217     echo "CN: Do not reboot your server and report this to OTRS immediately!"
 218     exit 1
 219 fi
 220 echo -n " grub5"
 221
 222 # fix possible wrong params in menu.lst
 223 cp_check_and_sed '^# groot=' \
 224   "s;^# groot=.*;# groot=$grub_root_device;g" \
 225       "$menu_file" || true
 226 cp_check_and_sed '^# kopt=' \
 227   "s;^# kopt=\(.*\)root=[^[:space:]]*\(.*\);# kopt=\1root=$root_device\2;g" \
 228       "$menu_file" || true
 229 /usr/sbin/update-grub >/dev/null 2>&1 || true
 230 echo -n " grub6"
 231
 232 # and final stage of devfs/udev brokeness fix
 233 if [ "x$install_device_resolved" != "x$install_device" ]; then
 234     # get original (symlinked device)
 235     root_device=$(find_device_nonresolved "/")
 236     if [ -z "$root_device" ]; then
 237         root_device=$(find_root_device)
 238     fi
 239
 240     # fix (hd0) mapping
 241     cp_check_and_sed '^\(hd0\)' \
 242         "s;^(hd0).*;(hd0)       $install_device;" "$device_map" \
 243         || true
 244
 245     # fix global root= invocation
 246     cp_check_and_sed '^# kopt=' \
 247       "s;^# kopt=\(.*\)root=[^[:space:]]*\(.*\);# kopt=\1root=$root_device\2;g" \
 248           "$menu_file" || true
 249
 250     # fix root= invocation for individual kernel profiles
 251     cp_check_and_sed '^kernel' \
 252       "s;\(^kernel.*\)root=[^[:space:]]*\(.*\);\1root=$root_device\2;g" \
 253           "$menu_file" || true
 254 fi
 255 echo -n " grub7"
 256
 257 # disable lilo
 258 if [ -e /etc/lilo.conf ]; then
 259     mv -f /etc/lilo.conf /etc/lilo.conf.old
 260     echo -n " lilo"
 261 fi
 262
 263 # mdadm
 264 if [ -x /usr/share/mdadm/mkconf ]; then
 265     if [ ! -e /etc/mdadm/mdadm.conf ]; then
 266         touch /etc/mdadm/mdadm.conf
 267     fi
 268
 269     /usr/share/mdadm/mkconf > /etc/mdadm/mdadm.conf.$$
 270     if ! cmp -s /etc/mdadm/mdadm.conf.$$ /etc/mdadm/mdadm.conf; then
 271         mv /etc/mdadm/mdadm.conf.$$ /etc/mdadm/mdadm.conf
 272     fi
 273     rm -f /etc/mdadm/mdadm.conf.$$ /etc/initramfs-tools/hooks/md \
 274         /var/lib/mdadm/CONF-UNCHECKED
 275     echo -n " mdadm"
 276 fi
 277
 278 # update initramfs accordingly (because of mdadm and udev)
 279 update-initramfs -u -k all >/dev/null 2>&1 || true
 280 echo -n " initramfs"
 281
 282 # finished
 283 echo "."
 284
 285 ################################################################################
 286
 287 # rest of configuration...
 288 echo -n "CN: Modifying the neccessary system files:"
 289
 290 # remove group 99
 291 if getent group proc >/dev/null 2>&1; then
 292     groupdel proc >/dev/null 2>&1
 293     echo -n " proc"
 294 fi
 295
 296 # remove oidentd from oident group
 297 if getent group oident >/dev/null 2>&1; then
 298     # sarge default
 299     cp_check_and_sed '^OIDENT_GROUP[[:blank:]]*=[[:blank:]]*nogroup' \
 300       's/^OIDENT_GROUP[[:blank:]]*=[[:blank:]]*nogroup/OIDENT_GROUP=oident/g' \
 301           /etc/default/oidentd || true
 302
 303     # old kernel-2.6-cn default
 304     cp_check_and_sed '^OIDENT_GROUP[[:blank:]]*=[[:blank:]]*proc' \
 305       's/^OIDENT_GROUP[[:blank:]]*=[[:blank:]]*proc/OIDENT_GROUP=oident/g' \
 306           /etc/default/oidentd || true
 307
 308     echo -n " oidentd"
 309 fi
 310
 311 # default kernel parameters
 312 rm -f /etc/sysctl.conf.$$
 313 cat > /etc/sysctl.conf.$$ <<EOF
 314 kernel.maps_protect=1
 315 net.core.rmem_default=1048576
 316 net.core.wmem_default=1048576
 317 net.ipv4.conf.all.accept_redirects=0
 318 net.ipv4.conf.all.accept_source_route=0
 319 net.ipv4.conf.all.log_martians=1
 320 net.ipv4.conf.all.rp_filter=1
 321 net.ipv4.conf.all.secure_redirects=1
 322 net.ipv4.conf.all.send_redirects=0
 323 net.ipv4.icmp_echo_ignore_broadcasts=1
 324 net.ipv4.icmp_ignore_bogus_error_responses=1
 325 net.ipv4.ip_forward=0
 326 net.ipv4.ip_local_port_range=10000 65000
 327 net.ipv4.tcp_congestion_control=cubic
 328 net.ipv4.tcp_ecn=0
 329 net.ipv4.tcp_max_syn_backlog=8192
 330 net.ipv4.tcp_retries1=2
 331 net.ipv4.tcp_rfc1337=1
 332 net.ipv4.tcp_syncookies=1
 333 vm.mmap_min_addr=65536
 334 EOF
 335
 336 # old kernel params
 337 if [ -e /etc/sysctl.conf ]; then
 338     egrep -v 'net\.core\.(r|w)mem_max|net\.ipv4\.tcp_(r|w)mem|vm\.bdflush|net\.ipv4\.ip_local_port_range|kernel\.rtsig-max|net\.ipv4\.tcp_syncookies|kernel\.exec-shield' \
 339         /etc/sysctl.conf >> /etc/sysctl.conf.$$
 340 fi
 341
 342 # add sysctl.conf Debian headers
 343 rm -f /etc/sysctl.conf-head
 344 cat > /etc/sysctl.conf-head <<EOF
 345 #
 346 # /etc/sysctl.conf - Configuration file for setting system variables
 347 # See sysctl.conf (5) for information.
 348 #
 349 EOF
 350
 351 # merge old and new in one conf, primarily respecting old
 352 script='
 353 my %confhash = ();
 354 my ($key, $value);
 355 while (<>)
 356 {
 357   chomp();
 358   if (/^\s*(\S+)\s*=\s*(.+)\s*$/o)
 359   {
 360     my ($key, $value) = ($1, $2);
 361     $key =~ s/\//./go;
 362     $confhash{$key} = $value;
 363   }
 364 }
 365 for (sort { $a cmp $b } keys %confhash)
 366 {
 367   print $_, "=", $confhash{$_}, "\n";
 368 }
 369 '
 370 rm -f /etc/sysctl.conf-new
 371 perl -e "$script" < /etc/sysctl.conf.$$ > /etc/sysctl.conf-new
 372 cat /etc/sysctl.conf-head /etc/sysctl.conf-new > /etc/sysctl.conf.$$
 373 rm -f /etc/sysctl.conf-head /etc/sysctl.conf-new
 374
 375 # finished with merging, move into sysctl.conf
 376 cp_mv /etc/sysctl.conf.$$ /etc/sysctl.conf
 377 echo -n " sysctl.conf"
 378
 379 # finished with basic kernel-2.6-cn stuff
 380 echo "."
 381
 382 ################################################################################
 383
 384 # intro
 385 echo -n "CN: Setting up PAM configurations:"
 386
 387 # update pam_limits accordingly
 388 if [ -e /etc/security/limits.conf ]; then
 389     rm -f /etc/security/limits.conf.$$
 390     cp /etc/security/limits.conf /etc/security/limits.conf.$$
 391     cp-update kernel-2.6-cn /etc/security/limits.conf.$$ <<EOF
 392 *               soft    core            0
 393 *               hard    nofile          4096
 394 *               soft    nofile          4096
 395 EOF
 396     cp_mv /etc/security/limits.conf.$$ /etc/security/limits.conf
 397     echo -n " limits"
 398 fi
 399
 400 # check pam.d/login
 401 if [ -e /etc/pam.d/login ]; then
 402     cp_check_and_sed '^#.*session.+required.+pam_limits.so' \
 403         's/^#.*session.+required.+pam_limits.so/session required pam_limits.so/' \
 404         /etc/pam.d/login || true
 405     echo -n " login"
 406 fi
 407
 408 # check pam.d/ssh
 409 if [ -e /etc/pam.d/ssh ]; then
 410     cp_check_and_sed '^#.*session.+required.+pam_limits.so' \
 411         's/^#.*session.+required.+pam_limits.so/session required pam_limits.so/' \
 412         /etc/pam.d/ssh || true
 413     echo -n " ssh"
 414 fi
 415
 416 # finished with PAM
 417 echo "."
 418
 419 ################################################################################
 420
 421 # fix old kernel-2.4-cn postrm
 422 if [ -e /var/lib/dpkg/info/kernel-2.4-cn.postrm ]; then
 423     echo "CN: Fixed old kernel-2.4-cn postrm."
 424     cat > /var/lib/dpkg/info/kernel-2.4-cn.postrm.$$ <<EOF
 425 #!/bin/sh
 426
 427 set -e
 428
 429 # be sure, be safe
 430 if [ "$1" != "remove" ]; then
 431   exit 0
 432 fi
 433
 434 # import CN-functions
 435 . /usr/share/carnet-tools/functions.sh
 436
 437 # remove us from limits.conf
 438 cp-update -r kernel-2.4-cn /etc/security/limits.conf
 439
 440 # remove us from modules
 441 cp-update -r kernel-2.4-cn /etc/modules
 442 EOF
 443     if ! cmp -s /var/lib/dpkg/info/kernel-2.4-cn.postrm \
 444         /var/lib/dpkg/info/kernel-2.4-cn.postrm.$$; then
 445         mv /var/lib/dpkg/info/kernel-2.4-cn.postrm.$$ \
 446             /var/lib/dpkg/info/kernel-2.4-cn.postrm
 447         chmod +x /var/lib/dpkg/info/kernel-2.4-cn.postrm
 448     fi
 449     rm -f /var/lib/dpkg/info/kernel-2.4-cn.postrm.$$
 450 fi
 451
 452 ################################################################################
 453
 454 # fix old kernel-cn postrm
 455 if [ -e /var/lib/dpkg/info/kernel-cn.postrm ]; then
 456     echo "CN: Fixed old kernel-cn postrm."
 457     cat > /var/lib/dpkg/info/kernel-cn.postrm.$$ <<EOF
 458 #!/bin/sh
 459
 460 set -e
 461
 462 # be sure, be safe
 463 if [ "$1" != "remove" ]; then
 464   exit 0
 465 fi
 466
 467 # import CN-functions
 468 . /usr/share/carnet-tools/functions.sh
 469
 470 # remove us from limits.conf
 471 cp-update -r kernel-cn /etc/security/limits.conf
 472
 473 # remove us from modules
 474 cp-update -r kernel-cn /etc/modules
 475 EOF
 476     if ! cmp -s /var/lib/dpkg/info/kernel-cn.postrm \
 477         /var/lib/dpkg/info/kernel-cn.postrm.$$; then
 478         mv /var/lib/dpkg/info/kernel-cn.postrm.$$ \
 479             /var/lib/dpkg/info/kernel-cn.postrm
 480         chmod +x /var/lib/dpkg/info/kernel-cn.postrm
 481     fi
 482     rm -f /var/lib/dpkg/info/kernel-cn.postrm.$$
 483 fi
 484
 485 ################################################################################
 486
 487 # dh_installdeb will replace this with shell code automatically
 488 # generated by other debhelper scripts.
 489
 490 #DEBHELPER#
 491
 492 exit 0